Improvement in rolls for rounding and straightening rods



` v1. s.V SEAMAL Y Rolls fglr Boundin'g'Ya-nd -Straightening Rods.

` Patented octpymm.

UNITEDSTATES PATENT OEEIGEs JOSEPH s. sEAMAN, 0E PITTsBUEe,PENNsYLvAN1A,AssIGNoE To HIMsELE, JAMES E. YOUNG, AND EoBEET sEEETH, oEsAME PLACE.

IMPROVEMENT IN ROLLS FQRROUNDlNG AND STRAIGHTENING RODS.

Specification forming part of Letters Patent No. 155,760, dated October 6, 1874; application tiled August 25, 1874.

To all whom t may concern:

Be it known that I, JosEPE S. SEAMAN, of Pittsburg, Allegheny county, Pennsylvania, have invented a Machine for Rounding and Straightening Metallic Rods, Bars, or Tubes, of which the following is a specification:

Myinvention relates to machinery for rounding or straightening, or rounding and straightening, metallic rods, bars, or tubes, wherein such rods, bars, or tubes are fed forward and rotated by, between, and along the biting-faces of grooved or collared rolls, the construction of the same being substantially as hereinafter described, with reference, by letters, to the accompanying drawings making a part of this specification, in which-.w

Figure l shows a side elevation of my improved machine. Fig. 2 shows a top or plan view of the rolls and` housings, and Fig. 3 shows a transverse vertical sectional elevation of the lnachine through the line A B of Fig. 2.

The housings h h are of any suitable construction, and are fitted up with the usual or other known appliances necessary in the operation of metal rolls-such as adjusting pressure and plummer blocks, h1 h1, and set-screws 71,2. In these housings are mounted, side by side, the rolls D D1, which are. driven by any suitable gearing, el.4 One of these main rolls, D, is arranged horizontally, or nearly so, and the other, D1, being adjusted or set at such distance therefrom as the diameter of the rod, bar, or tube to be operated on may require, is arranged with one end a little above, or the other a little below, or one above and the other below, the corresponding end or ends of the other roll, D. The amount of variation of the axes of the two rolls is such, or about such, as is adopted in cylindrical rolls for the same purpose-viz., securing a forward or feed motion in the bar, rod, or tube which is being operated on. But these rolls D Dl, instead of being made cylindrical, as heretofore, are grooved or made with a series of projecting collars, a a', and the faces of the collars then constitute the biting-surfaces. These collars a aare opposite each other in thetwo rolls. The restroll D2, being arranged beneath and between the main rolls D D1, is also, by preference,

grooved or made with projecting collars c,- but these collars c alternate with the collars c a', so that the latter shall, when in use, play between the former, or opposite the grooves formed thereby.

This element-viz., rolls collared and in clined, and with collars alternating, as de scribed-constitutes the rst part ofmy improvement; and the advantage gained by it is, that the rod, bar, or tube, at the point or along the line where it is griped by the collars a a', does not engage the collars c of the restroll. The bite of the collars c alternate with the bite of the collars a a', as a result of which I can do more perfect work than with the cylindrical or uncollared rolls heretofore in use.

In the use of cylindrical rolls, one of which is thrown slightly out of line with the other, it is obvious that the parallelism of contiguous surfaces is lost, and, hence, that the line of bite will be comparatively short.

To remedy this, and thereby secure a longer line of bite, I make the rolling surface or surfaces of the inclined roll D1 (whether the same be grooved or not) slightly hollowing or dishshaped in the direction of its length, the amount of such hollow or dish being such that the operative rolling-surfaces of the two main rolls will, when one. roll is inclined at the proper angle, be parallel with each other.

As shown in the drawing, this, the second part of my improvement, is illustrated by the middle collar of the roll D1 being slightly less in diameter than the end collars.

'With such construction eachv pair of collars c a on the two main rolls will take a bite on l-rolls shall be one above the other, instead of side by side; also, the collared main rolls D DL may be arranged as set forth, but in combination with a cylindrical rest-roll, D2, and such modification I include as a part of my invention.

` What I claim herein, and'desire to secure by" Letters Patent, is f 1. A pair of grooved Or collared rolls,Y D1.

one inclined, in combination with a rest-roll, D2, substantially as and for the purposes set forth. .r Y

2. In combination with the several rolls D D1 D2, the collars a a', arranged opposite each other on the rounding and straightening rolls, and the collars c on the rest-roll, the collars last named being arranged opposite the grooves of the main rolls7 substantially as described.

. mentin the combination of two rolls and a rest,

substantially as set forth. I

' JOSEPH s. SEAMAN.

Witnesses: y

S. HOWARD SPRAGUE, GEORGE H. CHRISTY. 

